Heat exchange article



Nov. 3, 1931. G. sHooP 1,830,375

HEAT EXCHANGE ARTICLE Filed April 4, 195o v5 sheets-snaai 1 f /7ffii/w62@ 5h00/t7 M y BLQMMML Invqnlor A Homey Nov. 3, i931. G, SHOQPLsaoms HEAT EXCHANGE ARTICLE Filed April 4, 1930 3 Sheets-Sheet 2 Altomey N0v.3,1931. i v @,SHOOP. 1,830,375

HEAT EXCHANGE ARTI CLE Filed April 4, 1930 3 Sheets-Sheet 5 T 'T da@ iffkay/ff 47 "1? "S22/fe w j L L L L E 3f@ --f/ 1 "T T f fr f 2f' ,/Z

L L I f' w Q f4 f 3f 1 1 '1 J/ d l f/ y f I jvz' aj j 55 7 1 Inventor 1n55d {Zoff/arie 67200/9 f By d L L torney Patented Nov. 3, 19.31

UNITED STATES PATENT OFFICE HEAT EXCHANGE ARTICLE Application led April,4, 1930. Serial No. 441,607.

This invention relates to a method of forming, and the article topromote heat exchange'. An object of the invention is to provide for a I'very simple and inexpensive method of 6' 'forming heat exchangeelements to be used for steam condensers, refrigerant gas, radiators forautomobiles, aeroplanes, air condltionmg 1n all kinds of buildmgs, heatsystems, and for all heat and cooling systems wherein exchange isdesired.

Another feature of the invention is toprovide a heat exchange conductorthat is very strong, compact and durable, thoroughly reliable for itsintended purpose, very simple in its method of assembly, facilitatingincreased production, and that is comparatively inexpensive tomanufacture.

With the foregoing and other objects in view, the invention consists ofa novel construction, combination and arrangement of parts aswill behereinafter more specifically described and illustrated in theaccompanyy ing drawings, wherein is disclosed an emtratingan applicationof one formv of the' fins therewith.'

Fig. 2 is a perspective view thereof being assembled,

Fig. Bis a fragmentary, longitudinal, vertical section thereof inassembled relation,

Fig. 4 is a transverse, detailed vertical section thereof,

Fig. 5 is a fragmentary, longitudinal, vertical section of a fluidconducting member showing'a modified form of fin assembled' thereon, Y

Fig. 6 is a fragmentary, longitudinal vertical section of the fluidconducting' member showing assembled therewith another modified form offin,

Fig. 7 is a fragmentary side elevation of the Huid conducting membershowing a modilied form of fin and fin attaching means, also in sideelevation,

Fig. 8 is a fragmentary plan view of the fluid conducting member and thefin construction shown in Fig. 1 of the drawings, with a modified formof fin attaching means, Fig. 9 is a fragmentary top plan view ofthestamped metal in attaching means, illustrated in Fig. 8, prior to theattachment thereof, J

Fig. 10 is a transverse, vertical detailed section taken substantiallyon the line 10-10 of Fig. 8,

Fig. l1 is a transverse vertical detailed section through a fluidconducting member with the iin attaching means illustrated in Fig. 12,

Fig. 12 is a fragmentary plan view of a modified form of iin attachingvmeans, prior to the assembly thereof, and

Fig. 13 is a fragmentary perspective view of the anchor bars associatedwith the iin attaching means, shown in Figs. 9 and l2.

The invention in its broadest aspect comprehends the method ofconstructing and the resulting article of manufacture, for exchangingheat from a confined body of iuid to a free body of iiuid or vice versa.The fluid conducting member, as will hereinafter appear may be polygonalor circular in cross section, and of any desired lineal configuration,since it would be a simple matter of application to form the radiatingfins, with a contacting surface contour and lineal configura-A tion tomeet the shape of the cross section and conliguration of the conductingmemler.

The conducting member and radiating fins are preferably of metal such asbrass, copper, steel, aluminum or alloys thereof, or any other ductilerigid material capable of being fabricated by the present method.

Furthermore, it is to be understood that ing or conducting member, inwhich isenclosed'a fluid, either at rest, or 1n motion.

This member 14 may be one of a plurality of' posed at faces 15, 16. Thechamberv 17 interiorly of the conductor 14 is entirely closed andy inthis chamber is the one fluid either at rest or in motion, with which itis desired to effect a heat exchange, with the fluid surrounding theoutside of this conductor member.

In allforms of the invention, the two series of radiating fins, areindicated at A and B.

All of the radiating fins are preferably formed of bendable metal strips18, 19 of substantially the same width as the faces 15, 16 of theconducting member 14, to which they are attached.

v These strips are of suicient rigidity to sus-1 tain their own shapeafter they have been crimped to the desired shape.

In the form of the invention shown in Figs.

1, 2, 3, 8, 10 and 11, the metal strips 18, 19

are each crimped transversely into a series of continuous substantiallyU-shaped crimps 20,21 having straight legs and crown portions withalternate crimpsfreversed with respect to intermediate crimps, therebyproviding inset pockets 22, 23, on each series.

In the form of the radiating fins A, B, shown in Fig. 7, the strips 18,19 are each crimped transversely into a series of continuous U-shapedcrimps 24, 25, having curved crowns and straight legs.

rIhe alternatg crimps are also reversed Wit-h respect to lntermediatecrimps to pirovide inset pockets 26, 27 with respect to the intermediatecrim s.

In the form o the radiating fins A, B shown in Fig. 5- of the drawings,the strips 18, 1'9 are each formed transversely with a continuous seriesof V-shaped crimps 28, 29 havindg alternate crimps of each seriesreverse Vwith respectto intermediate crimps, to provide alternatepockets 30, 31.

In the form of the ,radiating fins A, B, shown in Fig. 6 of thedrawings, lthe'strips 18, 19 are each crimped transversely with acontinuous series of crimps 32, 33 in the form of loops with alternateloops reversed with respect to intermediate loops to provide a1- ternatepockets 34, 35.

In view of the foregoing, ittherefore follows that the single strips orwebs of metal in `either-of the orms shown are very economicallyfabricated into a` series of continuous, spaced outstanding projections,that by reason of their'continuous nature and intervening pockets,present the maximum heat exchange area and a very inexpensive means foranchoring the fins, to the conductor 14.

All forms of the series of fins A, B, after crimping are lplaced on theconductor 14, the one series A superimposed on the face 15, and theother series, B depending from the other face 16. The series are soarranged that the pockets and the projections on the one series A are inalinement with the otherseries B.

Then a roundI strand of wire 36 'as shown in Figs. 1, 2, 5, 6, and 7 iswrapped about ythe conductor 14 and seats in the pockets of each seriesholding each series into contact with the conductor at the inner ends ofthe crimps. The wire 36 is wrapped in the continuous coil the entirelength of the conductor and fins, alternating from one pocket diagonallyto another as shown in Fig. 7' of the drawings.r On the other hand, afiat strip 37 'as shown in Fig. 3 may also be used to advantages in theattachment of the series -of fins having the crimps formed of straightcrowns, and legs. This Hat strip 37 gives a better anchorage for thoseseries of fins having the straight crowns. y

It will be understood that the fiat strand 37 is Wound the same as theround' strands 36 and described above.

I have other fastening means for the series of fins A, B, as shown inFigs. 8, 9, and 10. This fastening means is formed `of 'a stamped pieceof metal indicated vgenerali at 40 having a central longitudinally extening rib 41 projecting. laterally from each side of which are a series oftransversely extending, longitudinally spaced slat strips l 42 and 43which in turn merge at their outer ends in the respectivey Hat strips44, 45 respectively.

To use the fastening means 40, the longitudinal rib 21 is su erimposedon the end of I the conductor mem er 14 and the strips 44, 45 bentdownwardly over the series of crimps A, B with the series of spacedribsl 42, 43 seating in the pockets of the crimpsthereblyl7 holdingthe.' series of crimps in contact wit the opposed faces of the conductormember 14.

Then end strips .44, 45 are brought into abutting vrelation with eachother and the elongated anchor bars 46, 47 are disposed on' the outerfaces of the strips, and the bolts 48 extending throu h apertures in theanchor lars and the strips together, about the conuctor.

It will be a parent that the fastening' Another form of fastening meansfor the"I series of crimps is shown in Figs. 11 and 12, and indicatedgenerally at 49. This fastenl ing means consists of a centrallongitudinal channel bar 50 formed with a series of notches 51, 52 inthe upper edges of each leg.

' other side of the A series of transversely extending longitudinallyspaced round wires 53 project laterally from one side of the channel barand another seres 54 projects laterally .from the channel bar. The innerends of each series of wires 53, 54 extends through the respectiveseries of notches 51, 52 and are anchored to the channel bar 50 by meansof knots 55, 56 on the inner ends thereof.

To use the fastening means 49, the channel bar 50 is disposed with theinner face of the web against the inner end of the conductor member 14as is clearly shown in Fig. 11. The series of wires 53, 54 are thenwrapped over the series of crimps A, B seating in the A pockets betweenthe crimps and the ends of the wires crimped between the flat anchor`bars 46, 47 by the bolts 48 similar in all respects to the means ofanchoring the fastenin means 40.

it is thought that the present embodiment of the invention' has beendisclosed in considerable detail, merely for the purpose of.

exemplication, since in actual practice it attains the features ofadvantage enumerated as desirable in the statement of the invention andtheV above description. It is to be understood that by describing indetail herein any particular form, structure or arrangement, it is notintended to limit the invention beyond the terms of the claim or therequirements of the prior art.

Having thus described my invention, what I claimas new is A heatexchange element comprising a tubular member, a number of strips, eachcrimped transversely to provide a plurality of recesses, with bottomwalls of alternate recesses contacting the tubular member, and.

a fastening strip spirally wound around the recess strips and tubularmember and engagin the inner walls of said alternate recesses.

n testimony whereof I ax my signature.

GERTRUDE SHOOP.

